/* ===== CSS Variables ===== */
:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --bg-card-hover: #263548;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-light: rgba(59, 130, 246, 0.15);
    --success: #22c55e;
    --success-light: rgba(34, 197, 94, 0.15);
    --warning: #f59e0b;
    --warning-light: rgba(245, 158, 11, 0.15);
    --danger: #ef4444;
    --danger-light: rgba(239, 68, 68, 0.15);
    --info: #06b6d4;
    --info-light: rgba(6, 182, 212, 0.15);
    --border: #334155;
    --border-light: #475569;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-xs: 6px;
    --sidebar-width: 260px;
    --transition: all 0.2s ease;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 14px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
    height: 100vh;
}

#app {
    display: flex;
    height: 100vh;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

/* ===== Sidebar ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    z-index: 10;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
}

.logo i {
    font-size: 1.5rem;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

.nav-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--accent-light);
    color: var(--accent);
}

.nav-item i {
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border);
}

.btn-new-trip {
    width: 100%;
    padding: 0.75rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.btn-new-trip:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.sidebar-actions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.sidebar-secondary-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-sidebar-secondary {
    flex: 1;
    padding: 0.5rem;
    background: var(--bg-primary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    transition: var(--transition);
}

.btn-sidebar-secondary:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-light);
}

.btn-sidebar-secondary.calendar-btn {
    background: var(--success-light);
    color: var(--success);
    border-color: rgba(34, 197, 94, 0.3);
}

.btn-sidebar-secondary.calendar-btn:hover {
    background: var(--success);
    color: white;
}

.assign-section {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.assign-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.btn-assign-transport {
    font-size: 0.75rem !important;
    padding: 0.3rem 0.6rem !important;
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
}

.view {
    display: none;
    animation: fadeIn 0.3s ease;
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.view-header h1 {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.subtitle {
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.header-with-back {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

/* ===== Buttons ===== */
.btn-primary {
    background: var(--accent);
    color: white;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    font-size: 0.9rem;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    font-size: 0.9rem;
}

.btn-secondary:hover {
    background: var(--border-light);
}

.btn-danger {
    background: var(--danger-light);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
    padding: 0.6rem 1rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-danger:hover {
    background: var(--danger);
    color: white;
}

.btn-back {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-back:hover {
    color: var(--text-primary);
    background: var(--border-light);
}

.btn-sm {
    padding: 0.45rem 0.9rem;
    font-size: 0.85rem;
}

.btn-xs {
    padding: 0.3rem 0.6rem;
    font-size: 0.8rem;
}

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-xs);
    border: 1px solid var(--border);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.btn-icon:hover {
    color: var(--text-primary);
    border-color: var(--border-light);
}

/* ===== Dashboard ===== */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.stat-icon.blue { background: var(--accent-light); color: var(--accent); }
.stat-icon.green { background: var(--success-light); color: var(--success); }
.stat-icon.yellow { background: var(--warning-light); color: var(--warning); }
.stat-icon.red { background: var(--danger-light); color: var(--danger); }

.stat-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1;
}

.stat-info p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.dashboard-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.section-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
}

.section-card h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-card h2 i {
    color: var(--accent);
}

/* ===== Cards ===== */
.trip-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 0.75rem;
}

.trip-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.trip-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.trip-card-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.trip-card-dates {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.trip-card-destination {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.trip-card-progress {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.trip-card-progress-bar {
    height: 100%;
    border-radius: 2px;
    transition: width 0.5s ease;
}

.progress-high { background: var(--success); }
.progress-medium { background: var(--warning); }
.progress-low { background: var(--danger); }

.trip-card-badges {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
    flex-wrap: wrap;
}

.badge {
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-info { background: var(--info-light); color: var(--info); }

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.empty-state h3 {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

/* ===== Tabs ===== */
.tabs {
    display: flex;
    gap: 0.25rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.5rem;
    overflow-x: auto;
}

.tab {
    padding: 0.75rem 1.25rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.tab:hover {
    color: var(--text-primary);
}

.tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* ===== Validation Bar ===== */
.validation-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.validation-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
}

.validation-item.success {
    background: var(--success-light);
    color: var(--success);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.validation-item.warning {
    background: var(--warning-light);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.validation-item.danger {
    background: var(--danger-light);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.validation-item.info {
    background: var(--info-light);
    color: var(--info);
    border: 1px solid rgba(6, 182, 212, 0.3);
}

/* ===== Timeline ===== */
.timeline-container {
    position: relative;
}

.timeline-segment {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 0;
    position: relative;
}

.timeline-line {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 40px;
    flex-shrink: 0;
}

.timeline-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 3px solid var(--border-light);
    z-index: 1;
    flex-shrink: 0;
}

.timeline-dot.filled {
    background: var(--accent);
    border-color: var(--accent);
}

.timeline-dot.event { background: var(--warning); border-color: var(--warning); }
.timeline-dot.transport { background: var(--info); border-color: var(--info); }
.timeline-dot.accommodation { background: var(--success); border-color: var(--success); }
.timeline-dot.conflict { background: var(--danger); border-color: var(--danger); }
.timeline-dot.warning { background: var(--warning); border-color: var(--warning); }

.timeline-connector {
    width: 2px;
    flex: 1;
    background: var(--border);
    min-height: 20px;
}

.timeline-connector.conflict {
    background: var(--danger);
    border-style: dashed;
}

.timeline-connector.warning {
    background: var(--warning);
    border-style: dashed;
}

.timeline-card {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-bottom: 0.75rem;
    transition: var(--transition);
}

.timeline-card:hover {
    border-color: var(--border-light);
}

.timeline-card.conflict {
    border-color: var(--danger);
    background: rgba(239, 68, 68, 0.05);
}

.timeline-card.warning {
    border-color: var(--warning);
    background: rgba(245, 158, 11, 0.05);
}

.timeline-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.timeline-card-title {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.timeline-card-time {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-family: 'SF Mono', 'Consolas', monospace;
}

.timeline-card-type {
    font-size: 0.75rem;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-weight: 500;
}

.type-event { background: var(--warning-light); color: var(--warning); }
.type-transport { background: var(--info-light); color: var(--info); }
.type-accommodation { background: var(--success-light); color: var(--success); }
.type-gap { background: var(--bg-tertiary); color: var(--text-muted); }

.timeline-card-details {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
}

.timeline-card-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.conflict-warning {
    background: var(--danger-light);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-xs);
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    color: var(--danger);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.conflict-warning.warning {
    background: var(--warning-light);
    border-color: rgba(245, 158, 11, 0.3);
    color: var(--warning);
}

.conflict-warning.missing-connection {
    background: var(--info-light);
    border-color: rgba(6, 182, 212, 0.3);
    color: var(--info);
}

.suggestion-hint {
    background: var(--accent-light);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: var(--radius-xs);
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 1.25rem;
    line-height: 1.5;
}

.suggestion-hint i {
    margin-right: 0.3rem;
}

.suggestion-reason {
    font-size: 0.8rem;
    opacity: 0.8;
    display: block;
    margin-top: 0.25rem;
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.4rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.65rem 0.9rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.form-group textarea {
    min-height: 80px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-row-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent);
    flex-shrink: 0;
}

.checkbox-group label {
    margin-bottom: 0;
    cursor: pointer;
}

/* ===== Weather ===== */
.weather-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

.weather-placeholder {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

.weather-placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.weather-day {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    text-align: center;
    transition: var(--transition);
}

.weather-day:hover {
    border-color: var(--border-light);
}

.weather-day-date {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.weather-day-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.weather-day-temp {
    font-size: 1.25rem;
    font-weight: 700;
}

.weather-day-temp span {
    color: var(--text-secondary);
    font-weight: 400;
    font-size: 0.85rem;
}

.weather-day-details {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ===== Packing List ===== */
.packing-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.packing-category {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
}

.packing-category h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.packing-category h3 i {
    color: var(--accent);
}

.packing-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
}

.packing-item:last-child {
    border-bottom: none;
}

.packing-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
    cursor: pointer;
    flex-shrink: 0;
}

.packing-item label {
    flex: 1;
    cursor: pointer;
    font-size: 0.9rem;
}

.packing-item.checked label {
    text-decoration: line-through;
    color: var(--text-muted);
}

.packing-item .packing-source {
    font-size: 0.7rem;
    padding: 0.15rem 0.4rem;
    border-radius: 999px;
    white-space: nowrap;
}

.source-weather { background: var(--info-light); color: var(--info); }
.source-mandatory { background: var(--warning-light); color: var(--warning); }
.source-user { background: var(--accent-light); color: var(--accent); }

.packing-add {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.packing-add input {
    flex: 1;
    padding: 0.5rem 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    color: var(--text-primary);
    font-size: 0.85rem;
}

.packing-add input:focus {
    outline: none;
    border-color: var(--accent);
}

/* ===== Section Header ===== */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.section-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

/* ===== Event / Transport / Accommodation Cards ===== */
.item-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 0.75rem;
    transition: var(--transition);
}

.item-card:hover {
    border-color: var(--border-light);
}

.item-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.item-card-title {
    font-weight: 600;
    font-size: 1rem;
}

.item-card-subtitle {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.item-card-details {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.item-detail {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.item-detail i {
    color: var(--text-muted);
    width: 16px;
}

.item-card-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.item-card.missing {
    border-style: dashed;
    border-color: var(--warning);
    background: rgba(245, 158, 11, 0.05);
}

.item-card.suggestion-card {
    border-style: dashed;
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.05);
}

.item-card.suggestion-card .item-card-title {
    color: var(--accent);
}

.item-card.booked {
    border-left: 3px solid var(--success);
    background: rgba(34, 197, 94, 0.03);
}

.item-card.not-booked {
    border-left: 3px solid var(--danger);
    background: rgba(239, 68, 68, 0.03);
}

.item-card.missing .item-card-title::after {
    content: " (fehlt)";
    color: var(--warning);
    font-weight: 400;
    font-size: 0.85rem;
}

/* ===== Checklist View ===== */
.checklist-trip {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.checklist-trip-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    cursor: pointer;
}

.checklist-trip-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checklist-items {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.9rem;
    border-radius: var(--radius-xs);
    font-size: 0.9rem;
}

.checklist-item.done {
    color: var(--text-muted);
    text-decoration: line-through;
}

.checklist-item.missing {
    background: var(--danger-light);
    color: var(--danger);
}

.checklist-item.partial {
    background: var(--warning-light);
    color: var(--warning);
}

.checklist-item.complete {
    background: var(--success-light);
    color: var(--success);
}

.checklist-item i {
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalIn 0.2s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

.modal-header h2 {
    font-size: 1.15rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* ===== Toast ===== */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.3s ease;
    min-width: 280px;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.warning { border-left: 3px solid var(--warning); }
.toast.info { border-left: 3px solid var(--info); }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ===== Weather Summary Card ===== */
.weather-summary {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.weather-summary h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.weather-summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 0.75rem;
}

.weather-stat {
    text-align: center;
}

.weather-stat-value {
    font-size: 1.25rem;
    font-weight: 700;
}

.weather-stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ===== Mobile Sidebar Toggle ===== */
.sidebar-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 200;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.sidebar-toggle:hover {
    background: var(--bg-tertiary);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9;
}

.sidebar-overlay.active {
    display: block;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    html {
        font-size: 15px;
    }

    body {
        overflow: auto;
        height: auto;
    }

    #app {
        flex-direction: column;
        height: auto;
        min-height: 100vh;
    }

    .sidebar-toggle {
        display: flex;
    }

    .sidebar {
        position: fixed;
        left: -300px;
        top: 0;
        height: 100vh;
        width: 280px;
        transition: left 0.3s ease;
        z-index: 100;
    }

    .sidebar.open {
        left: 0;
    }

    .main-content {
        padding: 1rem;
        padding-top: 4rem;
        overflow-y: auto;
        overflow-x: hidden;
        height: auto;
    }

    .view-header {
        flex-direction: column;
        gap: 0.75rem;
    }

    .view-header h1 {
        font-size: 1.4rem;
    }

    .header-with-back {
        flex-direction: column;
        gap: 0.5rem;
    }

    .header-actions {
        width: 100%;
    }

    .header-actions .btn-secondary,
    .header-actions .btn-danger {
        flex: 1;
        justify-content: center;
    }

    .dashboard-stats {
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }

    .stat-card {
        padding: 0.75rem;
        gap: 0.5rem;
    }

    .stat-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .stat-info h3 {
        font-size: 1.15rem;
    }

    .stat-info p {
        font-size: 0.75rem;
    }

    .dashboard-content {
        grid-template-columns: 1fr;
    }

    .section-card {
        padding: 1rem;
    }

    .packing-container {
        grid-template-columns: 1fr;
    }

    .form-row, .form-row-3 {
        grid-template-columns: 1fr;
    }

    .tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        margin-bottom: 1rem;
        padding-bottom: 0;
    }

    .tabs::-webkit-scrollbar {
        display: none;
    }

    .tab {
        padding: 0.6rem 0.9rem;
        font-size: 0.8rem;
        white-space: nowrap;
        flex-shrink: 0;
    }

    .tab i {
        display: none;
    }

    .timeline-segment {
        gap: 0.75rem;
    }

    .timeline-line {
        width: 28px;
    }

    .timeline-dot {
        width: 14px;
        height: 14px;
        border-width: 2px;
    }

    .timeline-card {
        padding: 0.75rem 1rem;
    }

    .timeline-card-header {
        flex-direction: column;
        gap: 0.25rem;
        align-items: flex-start;
    }

    .timeline-card-actions {
        flex-wrap: wrap;
    }

    .modal-overlay {
        padding: 0;
        align-items: flex-end;
    }

    .modal {
        max-width: 100%;
        max-height: 95vh;
        border-radius: var(--radius) var(--radius) 0 0;
        margin: 0;
    }

    .modal-body {
        padding: 1rem;
    }

    .modal-footer {
        padding: 0.75rem 1rem;
    }

    .toast-container {
        left: 0.5rem;
        right: 0.5rem;
        top: 0.5rem;
    }

    .toast {
        min-width: auto;
        font-size: 0.85rem;
    }

    .item-card {
        padding: 1rem;
    }

    .item-card-header {
        flex-direction: column;
        gap: 0.5rem;
    }

    .item-card-details {
        flex-direction: column;
        gap: 0.4rem;
    }

    .item-card-actions {
        flex-wrap: wrap;
    }

    .validation-bar {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 0.25rem;
    }

    .validation-item {
        white-space: nowrap;
        flex-shrink: 0;
        font-size: 0.8rem;
        padding: 0.35rem 0.7rem;
    }

    .optimization-bar {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .weather-container {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 0.5rem;
    }

    .weather-summary-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }

    .packing-item {
        gap: 0.5rem;
    }

    .packing-add {
        flex-direction: column;
    }

    .packing-add input {
        width: 100%;
    }

    .checklist-trip {
        padding: 1rem;
    }

    .checklist-item {
        flex-direction: column;
        gap: 0.5rem;
        text-align: left;
    }

    .sidebar-footer {
        padding: 0.75rem;
    }

    .btn-new-trip {
        padding: 0.6rem;
        font-size: 0.9rem;
    }

    .btn-sidebar-secondary {
        font-size: 0.75rem;
        padding: 0.4rem;
    }

    .conflict-warning {
        font-size: 0.75rem;
        padding: 0.4rem 0.6rem;
    }

    .suggestion-hint {
        font-size: 0.8rem;
        padding: 0.5rem 0.75rem;
    }

    .assign-section {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 400px) {
    .dashboard-stats {
        grid-template-columns: 1fr;
    }

    .weather-container {
        grid-template-columns: 1fr 1fr;
    }

    .tab {
        padding: 0.5rem 0.7rem;
        font-size: 0.75rem;
    }
}

/* ===== Time Optimization ===== */
.optimization-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    background: var(--accent-light);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
}

.optimization-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent);
    font-size: 0.9rem;
}

.optimization-info i {
    font-size: 1.1rem;
}

.opt-table-wrapper {
    overflow-x: auto;
    margin-top: 0.75rem;
}

.opt-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.opt-table th {
    text-align: left;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    font-weight: 600;
    white-space: nowrap;
}

.opt-table td {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.opt-table .opt-changed {
    color: var(--success);
}

.opt-table .opt-unresolvable {
    color: var(--danger);
    font-size: 0.8rem;
}

.badge-warning {
    background: var(--warning-light);
    color: var(--warning);
}